科技创新与应用2024，Vol.14Issue(7)：76-79,4.DOI:10.19981/j.CN23-1581/G3.2024.07.018
复杂地层明挖地铁车站基坑施工稳定性数值模拟研究
摘要
Abstract
The excavation of foundation pit of subway station is a process of stress unloading,which will cause horizontal or vertical deformation of supporting structure and site,so the stability of foundation pit is particularly important.Taking Hechuan Road Station of Qingdao Metro Line 2 as the engineering background,the stability of open-cut foundation pit is studied.Based on the finite element analysis software,the Mohr-Coulomb constitutive model is used to establish a three-dimensional numerical analysis model considering the actual site conditions,excavation and support process.The evolution law of horizontal displacement of pile and vertical displacement of ground surface during layered excavation and support of foundation pit is studied.The stress and deformation characteristics of pile + internal support system during construction are analyzed.The numerical calculation results are compared with the monitoring data.It is concluded that the numerical simulation results are basically consistent with the field measurement results,which can provide reference experience for similar projects in Qingdao area.关键词
地铁车站/明挖基坑/桩-撑体系/数值模拟/变形分析Key words
subway station/open-cut foundation pit/pile-bracing system/numerical simulation/deformation analysis分类
交通工程引用本文复制引用
高闯..复杂地层明挖地铁车站基坑施工稳定性数值模拟研究[J].科技创新与应用,2024,14(7):76-79,4.基金项目
山东省自然科学基金项目(ZR2019MEE027) （ZR2019MEE027）
中铁二十五局集团有限公司科研项目(QDDT02-2022-00028) （QDDT02-2022-00028）
